GB156244A - A process for the oxidation of hydrocarbons into carbonyl compounds or acids - Google Patents

Abstract

Hydrocarbons are oxidized to aldehyde, ketonic or carboxylic compounds by passing a mixture of their vapour with oxygen at ordinary, increased, or reduced pressure over a non-volatile metallic oxide of an acid character maintained at a temperature below red heat, that is, below 580 DEG C. According to the example, anthraquinone is obtained by passing anthracene vapour and air over pumice coated with vanadic and at a temperature of 400 DEG C.; under similar conditions, toluene yields a mixture of benzaldehyde and benzoic acid. The Specification as open to inspection under Sect. 91 (3) (a) mentions molybdic acid and salts of uramic and chromic acids as suitable catalysts, and describes the preparation of a catalytic material by precipitating vanadic acid from its colloidal solution by animal charcoal or by shaking a colloidal solution of vanadic acid with finely-powdered bichromate in the presence of small pieces of pumice which have previously been soaked in a gum solution and dried. By the oxidation treatment, unsaturated hydrocarbons of high molecular weight are converted into acids. This subject-matter does not appear in the Specification as accepted.ALSO:Hydrocarbons are oxidized to aldehyde, ketone, or carboxylic compounds by passing a mixture of their vapour with oxygen at ordinary, increased, or reduced pressure over a non-volatile metallic oxide of an acid character maintained at a temperature below red heat, that is, below 580 DEG C. According to the example, anthraquinone is obtained by passing anthracene vapour and air over pumice coated with vanadic acid at a temperature of 400 DEG C.; under similar conditions, toluene yields a mixture of benzaldehyde and benzoic acid. The Specification as open to inspection under Sect. 91 (3) (a) mentions molybdic acid and salts of uranic and chromic acids as suitable catalysts, and describes the preparation of a catalytic material by precipitating vanadic acid from its colloidal solution by animal charcoal or by shaking a colloidal solution of vanadic acid with finely-powdered bichromate in the presence of small pieces of pumice which have been soaked in a gum solution and dried. By the oxidation treatment, unsaturated hydrocarbons of high molecular weight are converted into acids. This subject-matter does not appear in the Specification as accepted.